Roofii



UNrrEDasTATEs; PATENT-crimen;

MATHEW` STEWAR'I,"OF PHILADELPHIA, PENNSYLVANIA.'

Specification-of Letters Patent N o. 5,091, datedMay 1, 1847@ f joiningplates, for repairing it or replacing it with a new oneo-r for any otherpurpose.` Fig. 2 represents a view of the under side of ditto. Fig. 3 isan edge view of ditto.y Fig. 4 is a vertical section of ditto. ontheline w of Fig. l. Fig. 5 'is a .section of Va vroof showing severalof the aforesaid plates put together and screwed-to the laths orsheathing. Fig. 6 isa plan vof one of the: trian-v gular plates fittedagainst the comb or ridge of the roof. Fig. 8 isa perspective view ofvfone of the triangular plates arranged along the eaves of the roof. Fig.9 is a perspective view of; the plates arranged along the fire Wall.Fig. l1 is a perspective view of a portion of the saddlel piece or ridgecap4 that covers the ridgeVand secured to the ridge pole. Fig. 12 is aperspective view yofa roofl when completed with the aforesaid plates.

Fig. 13 is a vertical section of ditto on thel dotted line .a .e of Fig.14. Fig. 14 isa plan of the roof when finished.

Similar letters designate similar parts in the several figures.

First-Description of one of the plates designed to form part of a roofwhich may be detached without destroying theadjacent parts or plateshaving its upper' and lower edges rabbeted. A is the platecast of aquadrilateral form, plane on the upper side as at A, except its twoupper edges which are cast with rabbets A2,`on the upper surface, andits two lower edges which are cast with rabbets A3 on the under side;and at A4 where the screw passes through which is raised on the upperside in the form of a circular protuberance or curb A4L having acountersink to admit the head o f the screw, and the necessary cementfor protecting the screw from the weather. The center of the plate onthe under side is cast concave at A5 between the thick portions thereofAy which form the bearings which rest upon the laths or-sheathing.Thetwkof-corners]'at-A?? aref cast straightfand parallel, forming; ob-

- tuseangles wit-h thefour sides ofY theplates. f Thetwoupper` rabbetededges orfsides A? f Fig. 1,fare designed topass .under the two lowerrabetted edges A? Figs. 2 and 4 whenhf the plates are yput togetherasrepresented yin IFig.l 5.` The screw s Figs;x4 and 13 passes l througheach' .plateVV independently of the contiguous plates so .that when ftheplate' is required to be removed itis only necessary#4 to 'withdraw thescrew and loosen vthe screw .of the right and left platesy and theupper` plate and lift thelower edges of the upper kplates lslightly Vanddraw .thelower plate downward .when the two` upper. edges will-rbecornedisengaged from the lower rabbeted edges of the upperfcontiguousplates.-` The same plate or another. plate may be inserted withoutdestroying the, surrounding plates;

andthe platesfbeing cast ofthe samesizeef and `pattern there vwill beylno'. difficulty infitting fa .new plate linto the place of theoneremoved kand alsoI securing them adownf and combining them together asbefore described.: a The convex or semi-spherical protuberancef.;a`

through which the confining screw ,s passes is madeof sufficient. sizeto admit. yt-he Vforma- 5 tion.4 of. Athe aperture for the shankjofz-ethe screw and .a count-ersink to reoeivefthejhead andgasuliicientfquantity of cement., gor;A other tr article, to protect thehead from the weather. See Figs. 1- 3-4 and 13.

B Fig. 9, yrepresents one of the triangular plates fitted against thedivision wall or fire guard. The base andperpendicular of this plate aremade like the two corresponding sides ofthe plate above described. The

hypotenuse or long side, which is fitted against, the fire wall, is madestraight and plain` having a bearing to rest on the laths and beingsecured by letting the long side into a corresponding groove in the firewall and heldsecurely bythe lap of the plates, and by cement. C, Fig. 8is atriangular vplate arranged along the leaves. The plate is cast inthexsame form as plateA B Fig. 9, f-

vexcept that its long lside or hypotenuse which is placed parallel tothe eaves is cast with a flange C nearly at right angles to the face vofthe plate fitting over the eaves and conducting the water to the gutter,having the end ofeach flange cast with a notch C2 .to

correspond with the corner of the next ad# joiningplate fitted into saidnotch.

D, Fig. 6 is a 'triangular plate to be fitted against the comb of theroof. This plate is made in a similar manner to plate B Fig. 9, the longside or hypotenuse being placed parallel to and against the Vridgeandthe two other sides which are rabbeted being fitted to thecorresponding rabbeted sides 'ofthe adjoining plates-a screw beinginserted in the manner above described. E, Fig. 1l isa sectional view ofthe cast-A ing thatcoversthe two upper edges of the plates that comenearly together at the ridge,

. or comb, cast in the shape of a saddle having a vertical flange Eextending downward from the apex and arranged between the upper edges ofsaid plates, being perforated for bolts or screws by which it isfastened to the ridge pole or other convenient place, and when properlysecured effectually `secures the joint at the ridge against the entranceof water o r snow. f

The plates A are placed on thelaths in a position to bring the edgesthereof at an angle of 45 degs. with the parallel lines of the eaves andridge-or any required angle.`

The manner of uniting and securing the plates is more clearly seen atFig. 13 which is a vertical section on theline e" a of Fig. 14.

F is the gutter secured in the cornice below the eaves the` anges of thetriangular plate of the eaves extendingover the inner edges of thegutter.

. Having thus fully described the naar@ of my invention and improvementin cast .iron roong I proceed to state that what 35` I claim as myinvention and desire to secure by Letters Patent' isl. Forming therectangular plates A with rabbeted edges A2 A3 on opposite sides, flaton the upper side, or surface and concave on the nnder surface, havingtwo of the corners A7 of each plate cut offl parallel causing the platesto combine and unite and form close joints, having broad bearings A6 torest on the sheathing or laths, and a perforated protuberance, or lmobAt, and a countersink in the same to admit the shank and head of alscrew s back of the point of junction of the cut off corners A7 of theplates, so that when a plate is required to be removed it becomes onlynecessary to withdraw the screw s and slide the plate back from beneaththe contiguous plates and it becomes separated therefrom asv before de-3.' I also claim constructing the ridge cap E like an angular roof witha vertical plate E projecting down from the apex and perforated to admitbolts, or screws, by which it is secured to the ridge pole-the sloped`sides being made sufficiently wide to extend `over vthe adjoiningplates on either side of the ridge asabove described and represented atE Figs. ii-ie--iawiaY y i MATHEW STEWART. Witnesses: j i

G. L. MARTINDELL, ROBERT STEWART.

